Cooling Fans - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


General GM Chat When starting new posts, please specify YEAR, MAKE, MODEL, ENGINE type, and whatever modifications you have made. Chat about all things GM (and related cars). Off-topic stuff should be in the Lounge, and all Model specific mechanical problems should be posted in the proper forum.

Reply
 
 
 
Thread Tools Search this Thread
Old 05-18-2005, 03:35 PM   #1
Junior Member
Thread Starter
 
Join Date: May 2005
Posts: 6
Thanks: 0
Thanked 0 Times in 0 Posts
CanelyB is on a distinguished road
Default Cooling Fans

Hello maybe this has been awnsered before,but the cooling fans in the 1992 Bonnie
only work with the A/C on. Can any one help?[/b]
CanelyB is offline   Reply With Quote
Old 05-18-2005, 04:31 PM   #2
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

Not sure on your temps for the fans to kick on. But in the 95 era, pretty close they come on at 215 and like 225. Don't trust your gauge as it could be a few degrees off. They are only reference points.

If you have the stock t-stat of 195 you should normally run about 200-205 and if you swapped to a 180 you probably run about 185-190. That may help you figure out if your gauge is a little off.
BillBoost37 is offline   Reply With Quote
Old 05-18-2005, 06:40 PM   #3
Junior Member
Thread Starter
 
Join Date: May 2005
Posts: 6
Thanks: 0
Thanked 0 Times in 0 Posts
CanelyB is on a distinguished road
Default

Thanks for the reply,but it.* not the gagueif i let it sit there and run the temp will go all the way to the red before im forced to switch the a/c on to cool the engine down.
The fans just do not work unless a/c switched on.
CanelyB is offline   Reply With Quote
Old 05-18-2005, 06:55 PM   #4
BANNED
 
Join Date: Aug 2002
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
banned3800 is on a distinguished road
Default

Sounds like a bad switch somewhere.... when you turn on the AC the PCM sees this and calls for the fans to come on in low speed, then high speed... The PCM should function in a simmilar manner when the engine gets hot... I forget what switches there are that will controll this...

We need to know what the PCM is seeing and doing...

Maybe someone can answer this for me, but doesn't the PCM have its own temperature sensor, and well as a sensor for the gage cluster?

Possibly the one for the gage is functioning but the one for the PCM isn't... It would be good to see what temps the PCM is seeing... Being that the fans come on when you turn the AC on I believe that the PCM is doing its job, but it may be missing the correct temperature information...

Good Luck

__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote
banned3800 is offline   Reply With Quote
Old 05-19-2005, 03:13 AM   #5
Junior Member
Thread Starter
 
Join Date: May 2005
Posts: 6
Thanks: 0
Thanked 0 Times in 0 Posts
CanelyB is on a distinguished road
Default

You think maybe my temp. sensor is bad? thats what im starting to think.
CanelyB is offline   Reply With Quote
Old 05-19-2005, 03:15 AM   #6
Senior Member
True Car Nut
 
Join Date: May 2003
Location: Lethbridge, Alberta, _______Canada._______ West Coast Bonneville Fest ___05,06,07 Survivor___
Posts: 8,134
Thanks: 0
Thanked 0 Times in 0 Posts
SSEimatt93 is on a distinguished road
Default

The PCM shoudl throw a code for bad cooling fans, does it not?
SSEimatt93 is offline   Reply With Quote
Old 05-19-2005, 12:13 PM   #7
Junior Member
Thread Starter
 
Join Date: May 2005
Posts: 6
Thanks: 0
Thanked 0 Times in 0 Posts
CanelyB is on a distinguished road
Default

No, the cooling fans work,both of them,but only with the A/C on. Other wise my engine starts to cook.
CanelyB is offline   Reply With Quote
Old 05-19-2005, 02:43 PM   #8
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

The one thing I'm aware of that turns the fans on besides the AC telling the pcm is the temp sensor/thermocouple. You would need to find out from one of the 92 guys where it'* located on your particular model. Mine is located under the TB in the intake. It'* nicely done right between the TB and exhaust shield with just enough room to get to it with tools. I've replaced mine.

For the vets and their rating system
It'* a 2 beer project. Drink one while car cools and the other during actual work.
BillBoost37 is offline   Reply With Quote
Old 05-19-2005, 03:11 PM   #9
Junior Member
Thread Starter
 
Join Date: May 2005
Posts: 6
Thanks: 0
Thanked 0 Times in 0 Posts
CanelyB is on a distinguished road
Default

Thanks thats my next step.I already have it located,next to T/B.
CanelyB is offline   Reply With Quote
Old 05-19-2005, 04:47 PM   #10
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

Be careful to get the right one. There'* one for the gauge and one for the pcm. You need the one for the pcm.
BillBoost37 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Cooling fans never come on accept... WendysGirl 1992-1999 5 02-26-2004 02:41 PM
Cooling Fans for 97 Bonneville mvh_2000 1992-1999 5 09-24-2003 12:13 PM
Running Temperature/ Cooling Fans Boberle1150 1992-1999 10 08-25-2003 12:01 AM
Cooling Fans Jim W 1987-1991 8 08-05-2003 11:00 PM
How many cooling fans is my car supposed to have? egladman 1987-1991 24 06-26-2003 02:23 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 02:21 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.